fine bubble aerator Articles

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The principles of aeration and mixing utilizing process aerator technology

by Aeration Industries International (AII)  (Jan. 14, 2011)

Aeration and mixing are necessary elements for aerobic biological wastewater treatment processes to maintain a healthy, stabilized biological population and thus, insure optimal treatment of the wastewater assuming there is adequate contact time and substrate available. In the design of wastewater treatment plants, aeration typically involves ...

Alpha Factors in Full-Scale Wastewater Aeration Systems

by Water Environment Federation (WEF)  (Oct. 22, 2006)

ABSTRACTSurface active agents depress gas transfer at gas-liquid interfaces. They are present as measurable trace contaminants at all environmental and at most industrial gas-liquid interfaces. This paper presents the results of several studies, including lab and full scale studies that show the depression of gas transfer, usually quantified by ...

Aeration Ditch Upgrade Exceeds Expectations case study

by Aeration Industries International (AII)  (Jun. 2, 2015)

Triton Process Aerators Meets Future Nitrogen Permit Regulations When the a Pennsylvania Sewer Authority was researching methods to improve the dissolved oxygen levels in its wastewater treatment plant’s oxidation ditches in 2001, they decided to totally replace its aging brush rotor system. They replaced the rotors with the  ...

Efficient aeration system boosts energy savings

by Aeration Industries International (AII)  (Mar. 10, 2006)

A new efficient aeration system saves the Ontario, Ore., wastewater treatment facility $47,000 annually in energy costs. Besides giving this community a financial boost, the new system netted additional equipment cost savings by cutting aeration horsepower by more than half at the plant. The environmentally conscious city, located in the ...

In Situ Local Parameter Measurements for CFD Modeling to Optimize Aeration

by Water Environment Federation (WEF)  (Oct. 22, 2006)

ABSTRACTMeasurement methods to determine in situ local parameters were developed, in order to optimize design and operating parameters impacting oxygen transfer in aeration tanks equipped with EDPM membrane diffusers and slow speed mixers. New tools to measure bubble sizes and gas hold-ups were coupled with the traditional ones used to determine ...

Improving Efficiency and Reducing Energy and Maintenance Costs in Aeration Systems

by Water Environment Federation (WEF)  (Oct. 13, 2007)

Energy costs for operating an aeration system in a biological wastewater treatment plant often times exceeds 75% of the total energy costs for the plant. Adding in blower and diffuser maintenance costs, Aeration Systems are easily the most costly portion of the treatment process, many times consuming so many resources that other parts of the plant ...

Triton aerator/mixer saves energy & operational costs & reduces carbon footprint

by Aeration Industries International (AII)  (Jun. 18, 2009)

Municipal and industrial users tackle many wastewater treatment challenges at their facilities including meeting more stringent permit limits with limited or declining resources. The ideal solution for today’s professional is finding an innovative technology that offers a cost-effective, sustainable treatment solution that exemplifies ...

BM respirometry study about nitrification inhibition and actual aeration capacity in an activated sludge process case study

by SURCIS, S.L.  (Nov. 19, 2014)

Study for municipal WWTP in Spain This study is ordered to SURCIS as a consequence of the low process performance, practical absence of nitrification treatment. By other side, the mixed-liquor presented some abnormal features such as weakness, dark colour and abundant white foaming. Data for study interest Aeration system: fine ...

KLa Slot injector™ Aeration system assists cheese & Whey production plant solve its Nitrogen discharge challenge - Case Study

by KLa Systems, Inc.  (Jan. 14, 2015)

The Challenge A gourmet cheese, whey protein, and lactose production facility located in the Midwest had been utilizing a land application system for effluent discharge for over 40 years. Using a combination of ridge and furrow and spray irrigation, the plant had many years of success applying their wastewater to the land. However, as the gourmet ...

Prairie farm rehabilitation administration paper

by EP Aeration  (Mar. 14, 2012)

The aeration efficiency of two types of aeration devices, air injection and mechanical surface aerators was evaluated in farm dugouts in the Peace River Region of Alberta. The air injection systems were tested using three types of diffusers; open-ended tubing, linear fine bubble diffusers and a membrane diffuser. Our results indicate that without ...

Assessment of diffuser pressure loss on WWTPs in Baden-Württemberg

by IWA Publishing  (Jan. 1, 2011)

Aeration of activated sludge is a critical treatment step for the operation of activated sludge plants. To achieve a cost effective treatment process, assessing and benchmarking of aeration system performance are important measures. A simple means of gauging the relative condition of a fine bubble diffused aeration system is to evaluate the ...

Kärkölä municipality - rationalisation of Waste water plant

by W-Rix Ltd  (Nov. 28, 2009)

Situation in the beginning two Brush aerators  capacity is not sufficient during  the peaks Brush aerators demand relatively lot maintenance and are in the end of their working life The flow is not sufficient  part of the sludge lands on the bottom of ring basin Direct feedback connection from the oxygen sensor to the ...

An assessment of oxygen transfer efficiency in a gas permeable hollow fibre membrane biological reactor

by IWA Publishing  (Mar. 1, 2010)

The clean water oxygen transfer efficiency (OTE) of a full scale non-porous hollow fibre gas permeable (GP) membrane (surface area of 500 m2) was evaluated at inlet air pressures of 1.2, 1.4, and 1.8 atm using two established testing methods. To form a basis of comparison with traditional aeration technologies, additional testing was done with ...

Full scale evaluation of diffuser ageing with clean water oxygen transfer tests

by IWA Publishing  (Jan. 1, 2011)

Aeration is a crucial part of the biological wastewater treatment in activated sludge systems and the main energy user of WWTPs. Approximately 50 to 60% of the total energy consumption of a WWTP can be attributed to the aeration system. The performance of the aeration system, and in the case of fine bubble diffused aeration the diffuser ...

Use of Mass Balances for the Determination of Oxygen Contribution of the Different Air Sources in a Full-Scale Membrane Bioreactor

by Water Environment Federation (WEF)  (Oct. 13, 2007)

MBRs necessitate two sources of aeration: one for scouring the membranes (coarse bubble, CB) and the other for the biomass requirements (usually fine bubble, FB). In the framework of a in-depth study of a full scale municipal MBR plant (10 000 p.e.) where CB and FB are in the same tank (Biosep®), mass balances were used to determine the OTR of the ...

Oxygen, the fix for pond problems

by EP Aeration  (Mar. 14, 2012)

Aeration of a water feature should have three main considerations. These include preventing thermal stratification, balancing the dissolved oxygen levels throughout the water column from the sludge or benthic layer to the surface and balancing temperature levels throughout the water column. Although oxygen transfer from certain methods may be ...

Innovative system reduces ammonia at Hawick Sewage Treatment Works

by Water Active Ltd  (Apr. 3, 2013)

Hawick Treatment Works has reduced its ammonia discharge thanks to an innovative aeration system installed by market leaders Suprafilt. Aeration experts Suprafilt designed a highly efficient system using MF1100 plate diffusers, which increased the amount of oxygen to the site providing an instantaneous reduction in ammonia levels. The company, ...

Modelling a full scale membrane bioreactor using Activated Sludge Model No.1: challenges and solutions

by IWA Publishing  (Nov. 1, 2010)

A full-scale membrane bioreactor (1,600 m3 d−1) was monitored for modelling purposes during the summer of 2006. A complete calibration of the ASM1 model is presented, in which the key points were the wastewater characterisation, the oxygen transfer and the biomass kinetics. Total BOD tests were not able to correctly estimate the biodegradable ...

Activated Sludge Diffusion Provides Cost Effective Biological Odor Control at Two Texas Wastewater Treatment Facilities

by Water Environment Federation (WEF)  (Oct. 22, 2006)

ABSTRACTDuring recent expansions of the Rowlett Creek Regional WWTP in Plano, Texas and the Wilson Creek Regional WWTP in Lucas, Texas, activated sludge diffusion (ASD) biological odor control systems were installed to treat hydrogen sulfide (H2S) and other gaseous compounds. The ASD systems treat foul air collected from various sources, including ...

Built for Generations case study

by Aeration Industries International (AII)  (Jun. 2, 2015)

When building a wastewater treatment facility in 1984 officials in a Wisconsin village decided on an oxidation ditch design and chose Aire-O2®Aspirator aerators based on their flexibility and energy efficiency. Today, several of those aerators are still in use and the treatment facility operates at even more ...

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